WO2010097018A1 - Procédé de commande dynamique d'un affichage à cristaux liquides couleur à séquence de champ - Google Patents

Procédé de commande dynamique d'un affichage à cristaux liquides couleur à séquence de champ Download PDF

Info

Publication number
WO2010097018A1
WO2010097018A1 PCT/CN2010/070389 CN2010070389W WO2010097018A1 WO 2010097018 A1 WO2010097018 A1 WO 2010097018A1 CN 2010070389 W CN2010070389 W CN 2010070389W WO 2010097018 A1 WO2010097018 A1 WO 2010097018A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
time
crystal display
driving
backlight
Prior art date
Application number
PCT/CN2010/070389
Other languages
English (en)
Chinese (zh)
Inventor
陈国平
Original Assignee
Chen Guoping
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN2009101184393A external-priority patent/CN101807381B/zh
Priority claimed from CN 200910138337 external-priority patent/CN101840675B/zh
Priority claimed from CN2009101090786A external-priority patent/CN101989409A/zh
Application filed by Chen Guoping filed Critical Chen Guoping
Priority to US13/145,793 priority Critical patent/US8743035B2/en
Publication of WO2010097018A1 publication Critical patent/WO2010097018A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3622—Control of matrices with row and column drivers using a passive matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0235—Field-sequential colour display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3614—Control of polarity reversal in general

Definitions

  • the invention relates to a driving method of a passive matrix dynamic driving field sequential color liquid crystal display.
  • Field-sequential color liquid crystal display usually divides red (R), green (G), and blue (B) into three pictures (fields) in sequence by a color picture (frame) in time, and then switches those pictures at high speed. (Field) constitutes a color picture (frame). If the three primary colors of R, G, and B are used, the time displayed in each place is 1/3 of the time displayed by one frame, that is, three fields constitute one frame period. If it is 2 colors or 4 colors, the time displayed in each place is 1/2 or 1/4 of the time displayed in one frame period, that is, 2 fields or 4 fields constitute one frame period, and the rest is analogous.
  • the driving method of the liquid crystal display is mainly divided into active matrix driving and passive matrix (or simple matrix) driving.
  • a matrix is formed by a plurality of COMs and a plurality of SEGs, and when a certain COM is scanned, a selection voltage (ON voltage) is added to the number of liquid crystal cells selected by the SEG voltage. The number of unselected liquid crystal pixels is added to the non-selection voltage (OFF voltage).
  • the existing dynamic drive field sequential color liquid crystal display has a general structure including a liquid crystal display, a backlight, a backlight driver and a liquid crystal display driver, the backlight is disposed on a bottom side of the liquid crystal display, the backlight driver and the liquid crystal
  • the display driver drives the backlight and LCD respectively.
  • the driving method of the dynamic driving field sequential color liquid crystal display, FIG. 20 is an example of the positive display mode (the liquid crystal screen is in a transmissive state when the voltage is OFF) 1/2 duty cycle driving, obviously, the same is true for other duty ratio driving.
  • the following problem as shown in the figure, when we input the same red drive waveform from COM1 and COM2, that is, the liquid crystal pixel is turned on in the red light area, and is turned off in the green light area.
  • the polarity of the drive waveform in the same field is inverted at least once. Since the liquid crystal material has a delayed response time to the driving voltage, when the ON voltage or the OFF voltage is applied to the liquid crystal pixel, it corresponds to the ON response time or the OFF response time.
  • the light transmission intensity has a falling and rising area, and the factor affecting the color uniformity is mainly the rising area (ie, the dotted line part in the figure, also called the light leakage amount). Since the time period of COM1 and COM2 is different, the rising area of COM1 is in the cyan color. In the area, the rising area of COM2 is in the red area.
  • the red color of COM1 has a cyan component, but its red transmission intensity is greater than COM2, and the cyan color leakage amount is smaller than COM2. This causes the red of COM1 in the same picture to be different from the red of COM2. Of course, the same situation will occur when other colors are displayed. If we use the negative display mode (the LCD screen is projected when the voltage is ON), as shown in Figure 21, when we input the same color drive waveform from COM1 and COM2, For example, when the red drive waveform is used, the red drop region of COM2 is in the succeeding cyan region. COM1 has no cyan leakage. Causes the cumulative transmitted light intensity of each color of COM1 and COM2 to be different.
  • the resulting red color is different, so that the purity of the color, the uniformity of the color will change, and the uniformity of the brightness of the display will also change.
  • the same problem exists if such displays of other duty cycles are used, such as 1/3, 1/4, 1/8, ... 1/N.
  • the object of the present invention is to overcome the above drawbacks and to provide a driving method for a passive matrix dynamic driving field sequential color liquid crystal display in which the display colors of all COM liquid crystal pixels are substantially the same in the same field, and the color purity is improved.
  • Another object of the present invention is to improve the uniformity of color of a passive matrix dynamic drive field sequential color liquid crystal display.
  • the first technical solution to solve the above technical problem is to provide a driving method for dynamically driving a field sequential color liquid crystal display, wherein the backlight includes at least two or more passive colors of the matrix to dynamically drive the field sequential color liquid crystal.
  • the backlight includes at least two or more passive colors of the matrix to dynamically drive the field sequential color liquid crystal.
  • multiple fields constitute one frame, and each field contains COM scanning time and non-scanning time.
  • all liquid crystal pixel driving is performed by each COM scanning process in a certain order, non-scanning.
  • Time means that all liquid crystal pixels are not driven after the end of the scanning time (ie, all liquid crystal pixels are not applied with ON voltage)
  • the backlight is continuously lit; the non-scan time is between 1 and 10 milliseconds.
  • the preferred non-scan time is between 1 and 4 milliseconds, if the non-scan time is less than 1 millisecond, When the response speed of the liquid crystal is not fast, the effect is not obvious.
  • the non-scanning time is more than 4 milliseconds, in the case of multiple color fields, the scanning time of the COM is too short, and the driving voltage needs to be increased.
  • the passive matrix moment is relative to the active matrix moment.
  • the so-called active matrix moment is to add a switching element to each pixel, and the switching element usually uses a TFT element.
  • TFT components The drive voltage of all COM liquid crystal pixels is continuously maintained after being scanned.
  • the passive matrix has no TFT components, and the driving voltage of each COM liquid crystal pixel is no longer maintained after being scanned.
  • the liquid crystal pixels causing the different COMs are at different time periods in the process of returning from the pressurized state to the non-pressurized state.
  • the liquid crystal pixels of the COM at the end of the scan cannot be made to return from the pressurized state to the non-pressurized state in the same field as the liquid crystal pixels of other COMs. Therefore, we need to adjust the length of the non-scanning time according to the liquid crystal OFF response time in the liquid crystal display, so that the cumulative transmitted light intensity of all the liquid crystal pixels in each field is substantially the same.
  • each of the COMs is scanned twice or more during the scan time of the same field, and the scanning order between adjacent scans is reversed.
  • the scan order of each of the COMs is reversed during the scan time of the field corresponding to the backlight of the same color.
  • the non-scan time is placed after the scan time.
  • the passive matrix dynamic driving field sequential color liquid crystal display is in a positive display mode or a negative display mode, and the voltage between all COM and SEG in the non-scanning time is less than or equal to the OFF voltage, preferably zero voltage.
  • the OFF voltage is the voltage that the liquid crystal pixel is applied when it is not selected. Although this voltage is insufficient to drive the liquid crystal pixels, when the number of scanning COMs is increased, the cross-effect of the non-selected liquid crystal pixels may be enhanced to affect the display effect. Therefore, it is best to minimize the voltage between COM and SEG during the non-scanning time, preferably equal to zero voltage.
  • the voltage between COM and SEG in the non-scanning time can be zero voltage, in order to reduce the DC component on the liquid crystal pixel, the respective waveforms of COM and SEG can also be combined by the waveforms of positive and negative polarities.
  • the two colors are complementary colors, that is, white when lit at the same time.
  • the colors of the backlight are red, green, and blue.
  • the backlighting time of the backlight is later than the start time of the initial COM scan, and the backlight delayed turn-on time is between 0.5 and 2.0 milliseconds.
  • the inverse of the duty cycle of the driving waveform of the passive matrix dynamic driving field sequential color liquid crystal display is equal to the actual COM number of the display.
  • the inverse of the duty cycle of the driving waveform of the passive matrix dynamic driving field sequential color liquid crystal display is greater than the actual COM number of the display.
  • the backlights are each displayed once, and the number of times the liquid crystal pixels are switched in the same color region of the backlight is greater than or equal to two times.
  • the dynamic driving field sequential color liquid crystal display is in display contrast and There are still some defects in the purity of color, which needs to be further improved.
  • the reason is that when the OFF response time of the liquid crystal pixel is long, The corresponding non-scanning time needs to be lengthened. Since the liquid crystal pixels are not driven during the non-scanning time and the backlight is continuously turned on, the liquid crystal pixels that originally need to be turned off in the positive display mode cannot be effectively turned off, and there is a long time of light leakage. The color of the overall picture is too light and the contrast is not good.
  • the negative display method has similar problems.
  • the present invention further provides a second technical solution: a driving method for dynamically driving a field sequential color liquid crystal display, wherein the backlight comprises at least two or more passive light moment dynamic driving field sequential color liquid crystals of different colors
  • the backlight comprises at least two or more passive light moment dynamic driving field sequential color liquid crystals of different colors
  • the display multiple fields constitute one frame, and each field includes COM scanning time, non-scanning time, and backlight closing time. During the scanning time, all liquid crystal pixel driving is scanned by each COM in a certain order.
  • the non-scanning time means that all liquid crystal pixels are not driven after the scanning time is over (ie, all liquid crystal pixels are applied with a voltage less than or equal to the OFF voltage, or zero volts, the same below)
  • the backlight closing time means that all liquid crystal pixels are not driven after the non-scanning time ends (ie, all liquid crystal pixels are applied with a voltage less than or equal to an OFF voltage, or zero volts).
  • the time when the backlight is turned off, the sum of the non-scanning time and the backlight closing time is greater than or equal to 1 millisecond to less than or equal to 10 milliseconds.
  • the combination of the non-scanning time and the backlight closing time is preferably greater than or equal to 1 millisecond to less than or equal to 5 milliseconds.
  • the passive matrix moment is relative to the active matrix moment.
  • the so-called active matrix moment is to add a switching element to each pixel, and the switching element is usually a TFT element.
  • TFT components The drive voltage of all COM liquid crystal pixels is continuously maintained after being scanned.
  • the passive matrix has no TFT components, and the driving voltage of each COM liquid crystal pixel is no longer maintained after being scanned.
  • the liquid crystal pixels causing the different COMs are at different time periods in the process of returning from the pressurized state to the non-pressurized state.
  • the liquid crystal pixels of the COM at the end of the scan cannot be made to return from the pressurized state to the non-pressurized state in the same field as the liquid crystal pixels of other COMs.
  • the OFF response time of the liquid crystal pixel is long, the corresponding non-scanning time needs to be lengthened. Since the liquid crystal pixels are not driven during the non-scanning time and the backlight is continuously turned on, the liquid crystal pixels that originally need to be turned off in the positive display mode cannot be effectively turned off, and the light leakage for a long time causes the overall picture color to be too light. The contrast is not good. Of course, the negative display method has similar problems. In order to improve the above problem, we added a backlight to turn off the light after the non-scanning time.
  • the backlight closing time refers to the time when all the liquid crystal pixels are not driven but the backlight is turned off after the non-scanning time ends, and the color of the screen is too light by adjusting the length of the backlight closing time.
  • the disadvantage of poor contrast Experiments have shown that this method is effective.
  • the backlight closing time is preferably less than or equal to the length of the non-scanning time. If it is too long, it may shorten the length of the non-scanning time too much. Causes the color of the picture to be uneven.
  • each of the COMs we used each of the COMs to be scanned twice or more during the scan time of the same field, and the scanning order between adjacent scans was reversed. , Alternatively, in the next two frames, the driving method of the opposite scanning order of each of the COMs is improved in the scanning time of the field corresponding to the backlight of the same color.
  • the non-scan time is placed after the scan time, and the backlight is turned off after the non-scan time.
  • the passive matrix dynamic driving field sequential color liquid crystal display is in a positive display mode or a negative display mode, and the voltage between all COM and SEG is less than or equal to the OFF voltage during the non-scanning time and the backlight closing time, preferably Zero volts.
  • the OFF voltage is the voltage that the liquid crystal pixel is applied when it is not selected. Although this voltage is insufficient to drive the liquid crystal pixels, when the number of scanning COMs is increased, the cross-effect of the non-selected liquid crystal pixels may be enhanced to affect the display effect. Therefore, it is best to minimize the non-scan time and the voltage between COM and SEG during the backlight shutdown time, preferably equal to zero volts.
  • the voltage between COM and SEG can be zero volts during non-scan time and backlight shutdown time
  • the respective waveforms of COM and SEG may be combined by a waveform of positive and negative polarities.
  • the passive matrix dynamic driving field sequential color liquid crystal display is a dynamic driving field sequential color liquid crystal display with a frame rate between 45 Hz and 80 Hz.
  • the passive matrix dynamic driving field sequential color liquid crystal display is a non-bistable dynamic driving field sequential color liquid crystal display of TN, STN, HTN, OCB, and VA type.
  • the two colors are complementary colors, that is, white when lit at the same time.
  • the colors of the backlight are red, green, and blue.
  • the passive matrix dynamic driving field sequential color liquid crystal display comprises a liquid crystal display, a backlight, a backlight driver and a liquid crystal display driver, the backlight is disposed on a bottom side of the liquid crystal display, the backlight driver and the liquid crystal
  • the display driver drives the backlight and LCD respectively.
  • the backlighting time of the backlight is later than the start time of the initial COM scan, and the backlight delaying on time is between 0.5 milliseconds and less than or equal to 2 milliseconds.
  • the inverse of the duty cycle of the driving waveform of the passive matrix dynamic driving field sequential color liquid crystal display is equal to the actual COM number of the display.
  • the inverse of the duty cycle of the driving waveform of the passive matrix dynamic driving field sequential color liquid crystal display is greater than the actual COM number of the display.
  • the backlights are each displayed once, and the number of times the liquid crystal pixels are switched in the same color region of the backlight is greater than or equal to two times.
  • the invention adopts the scanning of each COM in the same field, and in addition to the scanning time of the COM in each field, the non-scanning time is added, and the backlight is continuously lit, so that the last can be effectively prevented.
  • a driving waveform has a rising region of the transmission intensity after power-off (positive display), or a falling region (negative display) extends into the adjacent other color regions to allow the accumulation of all liquid crystal pixels in each field.
  • the light intensity is basically the same, which greatly improves the consistency of the display color of such displays, improves the purity of the color and the uniformity of the brightness, and reduces the minimum frequency of the passive matrix dynamic driving field sequential color liquid crystal display without flickering. .
  • the present invention also employs that each COM in the same field is scanned, and in addition to the scan time and non-scan time of COM in each field, the backlight turn-off time is increased after the non-scan time, so that It can increase the purity and contrast of colors by making the display colors of all liquid crystal pixels in each field relatively consistent.
  • the display effect of the passive matrix dynamic driving field sequential color liquid crystal display is improved.
  • 1A is a schematic diagram showing the principle of driving waveforms of a B-mode positive display driven by a 1/4 duty cycle according to the first aspect of the present invention.
  • FIG. 1 is a schematic diagram showing the principle of driving waveforms of a B waveform which is driven by a 1/2 duty cycle in the first scheme of the present invention.
  • FIG. 2 is a schematic diagram showing the principle of driving waveforms of a B-mode positively driven by a 1/3 duty cycle driven by the first scheme of the present invention.
  • FIG. 3 is a schematic diagram showing the principle of the waveform of the same color in the same color in the immediately adjacent two frames of the first embodiment of the present invention using the 1/2 duty-driven B waveform.
  • Fig. 4 is a schematic diagram showing the principle of the waveform in which the scanning sequence of the first field of the present invention is reversed in the same field using the 1/3 duty-driving B waveform.
  • Figure 5 is a perspective view of the first aspect of the present invention in which the B-waveform driving using the 1/2 duty cycle is displayed in the same field, and the field scanning order of the same color is reversed in the immediately adjacent two frames. Schematic diagram of the waveform principle.
  • Figure 6 is a cross-sectional view of the first aspect of the present invention in which the B-waveform driving using the 1/3 duty cycle is reversed in the same field, and the field scanning order of the same color is reversed in the immediately adjacent two frames. Schematic diagram of the waveform principle.
  • Fig. 7 is a schematic diagram showing the principle of driving waveforms of the A waveform negative driving using the 1/2 duty ratio driving according to the first aspect of the present invention.
  • Figure 8 is a schematic diagram showing the principle of a positive drive waveform of a display having a 1/3 duty cycle using a 1/4 duty cycle drive wave in the first aspect of the present invention.
  • FIG. 9 is a schematic diagram showing the principle of a negative display driving waveform of a display having a 1/3 duty ratio by using a 1/4 duty drive wave in the first embodiment of the present invention.
  • Fig. 10 is a schematic diagram showing the principle of driving waveforms of a B-mode positively driven B-waveform driving using a 1/2 duty ratio (two-color backlight).
  • Fig. 11 is a schematic diagram showing the principle of driving waveforms of a B-mode positively driven B-waveform driving using a 1/2 duty ratio (three-color backlight).
  • FIG. 12 is a schematic diagram showing the waveform principle of the second embodiment of the present invention in which the field scanning order of the same color in the immediately adjacent two frames is reversed using the 1/2 duty-driven B waveform.
  • Figure 13 is a schematic diagram showing the principle of the waveform in the same field in the same field in which the B waveform of the second embodiment of the present invention is displayed using a 1/3 duty cycle.
  • Figure 14 is a second embodiment of the present invention in which the B-waveform driving using the 1/2 duty cycle is displayed in the same field, and the scanning order of the same color is reversed in the immediately adjacent two frames. Schematic diagram of the waveform principle.
  • Figure 15 is a second embodiment of the present invention in which the B-waveform driving using the 1/3 duty cycle is displayed in the same field, and the scanning order of the same color is reversed in the immediately adjacent two frames. Schematic diagram of the waveform principle.
  • Fig. 16 is a schematic explanatory diagram showing the definition of the total light leakage amount of the driving waveform of the 1/2 duty-driving B waveform of Fig. 10 (two-color backlight).
  • 17 is a color diagram of a backlight of the present invention in which two sets of colors are used and liquid crystal pixels are switched twice in the same color region.
  • FIG. 18 is a color diagram showing the backlight of the present invention in three sets of colors and the liquid crystal pixels being switched twice in the same color region.
  • 19 is a color diagram showing the backlight of the present invention in three sets of colors and the liquid crystal pixels being switched three times in the same color region.
  • 20 is a schematic diagram showing waveforms of a waveform driving positive driving of a conventional dynamic driving field sequential color liquid crystal display A.
  • 21 is a schematic diagram showing waveforms of a waveform negative display driving of a conventional dynamic drive field sequential color liquid crystal display A.
  • the present invention is also suitable for having three or more different colors.
  • the display such as four different colors or five different colors, etc.
  • the color of the backlight is two colors, it is preferable that the two colors are complementary colors.
  • the color combinations of the most commonly used backlights in the present invention are the three primary colors of red, green and blue.
  • the passive matrix dynamic driving field sequential color liquid crystal display of the present invention generally comprises a liquid crystal display, a backlight, a backlight driver and a liquid crystal display driver, and the backlight is disposed at the bottom or side of the liquid crystal display.
  • the backlight driver and the liquid crystal display driver respectively drive the structure of the backlight and the liquid crystal display. It is also possible to select a liquid crystal display of a suitable bias voltage.
  • the liquid crystal display in the present invention may be a liquid crystal display in which each COM in each field is driven positively and negatively, respectively.
  • the liquid crystal display in the present invention may be any one of a TN, STN, HTN, OCB, VA type non-bistable dynamic drive field sequential color liquid crystal display; the dynamic drive field sequential color liquid crystal display may have a frame rate Dynamically driven field sequential color liquid crystal display adjusted between 45 Hz and 80 Hz.
  • waveform inversion is usually required in the same field during dynamic driving, and two waveforms (A waveform and B waveform) can be used.
  • the A waveform is COM1(+)COM1(-)COM2(+)COM2(-)
  • the B waveform is COM1(+)COM2(+)COM1(-)COM2(-).
  • Most of the examples in this description use B waveforms.
  • the A waveforms that are not exemplified are also applicable.
  • the backlight delays the turn-on time preferably between 0.5 and 2.0 milliseconds.
  • FIG. 1A is a schematic diagram showing the principle of driving waveforms of a B waveform that is driven by a 1/4 duty cycle according to the present invention.
  • This embodiment adopts a TN type liquid crystal display with a positive display mode, and the bias voltage is 1/3.
  • the OFF response time of the liquid crystal is 10 milliseconds. It comes in two different colors (red, Cyan LED backlight, driven by 1/4 duty cycle, the actual COM number is 4; each COM in the same field (with the same color in the same field, the same below) is scanned twice in sequence And the positive and negative polarities are reversed once.
  • the frame rate is variable from 40 Hz to 60 Hz.
  • the non-scanning time is variable from 0 milliseconds to 11 milliseconds, and the actual voltage applied by the liquid crystal pixels in the non-scanning time is 0V to OFF voltage (the OFF voltage is 2V), And the respective waveforms of COM and SEG are inverted positively and negatively during the non-scanning time, and the backlight is continuously lit.
  • the frame frequency when the frame frequency is set to 40 Hz, there is sometimes a flickering feeling.
  • the frame rate is between 45 Hz and 60 Hz.
  • the time of each color field is shortened, and the length of the non-scanning time is also shortened. At this time, we need to shorten the OFF response time of the liquid crystal pixels accordingly.
  • the invention adopts a driving waveform of a B waveform which is driven by a 1/8 duty ratio, and adopts a positive display type TN liquid crystal display with a bias voltage of 1/4.
  • the OFF response time of the liquid crystal is 6 milliseconds. It comes in three different colors (R, G, The LED backlight of B) is driven at a 1/8 duty cycle, and the actual COM number is 8; each COM in the same field is sequentially scanned twice and the positive and negative polarities are inverted once.
  • the frame rate is set to 50 Hz.
  • the non-scanning time is variable from 0 milliseconds to 6 milliseconds, the actual voltage applied by the liquid crystal pixels in the non-scanning time is 0V, and the backlight is continuously lit.
  • FIG. 1 is a schematic diagram showing the principle of driving waveforms of a B waveform which is driven by a 1/2 duty cycle according to the present invention.
  • the dotted line in the figure is the amount of light leakage.
  • FIGS. 1T and 10 only the schematic regions of the amount of light leakage are shown in FIGS. 1T and 10, and the relevant portions in the other drawings are also present in the amount of light leakage, and can be analogized.
  • a TN type liquid crystal display with a positive display mode is used, and the bias voltage is 1/2.
  • the OFF response time of the liquid crystal is 3 milliseconds. It uses three different color (R, G, B) LED backlights, driven at 1/2 duty cycle, the actual COM number is 2; each COM in the same field is scanned twice in sequence and The positive and negative polarities are reversed once.
  • the frame rate is 60 Hz.
  • the non-scanning time is between 0 milliseconds and 4 milliseconds, the actual voltage applied by the liquid crystal pixels in the non-scanning time is zero voltage, and the backlight is continuously lit.
  • the input area of COM2's green light transmission intensity is in the same green non-scanning area as COM1 after entering a red driving waveform from COM2, and will not enter the next frame.
  • the rising area of the blue light transmission intensity of this COM2 is in the same blue non-scanning area as COM1, and does not enter the red area of the next frame.
  • the amount of light leakage of the two COMs is basically the same. That is to say, the cumulative transmitted light intensity of all the liquid crystal pixels in each field is substantially the same, so that the red color of COM1 and the red color of COM2 in the same picture are substantially the same. As shown in Figure 1.
  • FIG. 2 is a schematic diagram showing the principle of driving waveforms of the B waveform which is driven by the 1/3 duty cycle of the present invention.
  • This embodiment adopts a positive display mode HTN type liquid crystal display with a bias voltage of 1/3.
  • the OFF response time of the liquid crystal is 3 milliseconds. It uses three different color (R, G, B) LED backlights, driven by 1/3 duty cycle, the actual COM number is 3; in the same field, each COM is scanned twice in sequence and positive The negative polarity is reversed once.
  • the frame rate is 50 Hz.
  • the actual voltage applied by the liquid crystal pixels during the non-scanning time is the OFF voltage, and the backlight is continuously lit.
  • FIG. 3 is a schematic diagram of the driving waveform of the B waveform in the present invention using a 1/2 duty cycle driving.
  • a TN type liquid crystal display with a positive display mode is adopted, and the OFF response time of the liquid crystal is 3 milliseconds.
  • It uses two different color (red and cyan) LED backlights, driven by 1/2 duty cycle, the actual COM number is 2; in the same field, each COM is scanned twice in sequence, and positive and negative The polarity is also reversed once.
  • the COM scanning order in the field of the same color (cyan) corresponding to each of the adjacent two frames is reversed.
  • the frame rate is 60 to 80 Hz.
  • the non-scanning time is 2 to 3 milliseconds, the actual voltage applied by the liquid crystal pixels in the non-scanning time is 0 voltage, and the backlight is continuously lit.
  • FIG. 4 is a schematic diagram showing the principle of driving waveforms of the B waveform which is driven by the 1/3 duty cycle of the present invention.
  • a TN type liquid crystal display with a positive display mode is adopted, and the OFF response time of the liquid crystal is 3 milliseconds.
  • R, G, B three different color
  • the frame rate is 50 to 80 Hz.
  • the non-scanning time is 2 to 3 milliseconds, the actual voltage applied by the liquid crystal pixels in the non-scanning time is the OFF voltage, and the backlight is continuously lit.
  • FIG. 5 is a schematic diagram showing the principle of driving waveforms of the B waveform which is driven by the 1/2 duty cycle of the present invention.
  • This embodiment adopts a positive display mode HTN type liquid crystal display with a bias voltage of 1/2.
  • the OFF response time of the liquid crystal is 3.5 milliseconds. It uses three different color (R, G, B) LED backlights, driven by 1/2 duty cycle, the actual COM number is 2; in the same field, each COM is forward and reverse The scan was performed once, and the positive and negative polarities were also inverted once.
  • the COM scanning order in the field of the same color corresponding to each of the adjacent two frames is reversed.
  • the frame rate is 60 to 80 Hz, which is shown as 60 Schematic diagram of the Hz state.
  • the non-scanning time is 2.5 to 3.5 milliseconds, the actual voltage applied by the liquid crystal pixels in the non-scanning time is 0 voltage, and the backlight is continuously lit.
  • FIG. 6 is a schematic diagram showing the principle of driving waveforms of the B waveform which is driven by the 1/3 duty cycle of the present invention.
  • This embodiment adopts a STN type liquid crystal display with a positive display mode, and the bias voltage is 1/3.
  • the OFF response time of the liquid crystal is 4 milliseconds. It uses three different color (R, G, B) LED backlights, driven by 1/3 duty cycle, the actual COM number is 3; in the same field, each COM is forward and reverse The scan was performed once, and the positive and negative polarities were also inverted once.
  • the COM scanning order in the field of the same color corresponding to each of the adjacent two frames is reversed.
  • the frame rate is 60 to 80 Hz, which is shown as 60 Schematic diagram of the Hz state.
  • the actual voltage applied by the liquid crystal pixels in the non-scanning time is 0 voltage, and the backlight is continuously lit.
  • FIG. 7 is a schematic diagram of the driving waveform of the A waveform negative display driven by the 1/2 duty cycle of the present invention.
  • a VA type liquid crystal display with a negative display mode is used, and the bias voltage is 1/2.
  • the OFF response time of the liquid crystal is 4 milliseconds. It uses two different color (red and blue) LED backlights, driven by 1/2 duty cycle, the actual COM number is 2; in the same field, each COM is scanned twice in sequence and positive and negative sexual reversal once.
  • the frame rate is 60 Hz.
  • the non-scanning time is between 0 milliseconds and 4 milliseconds, the actual voltage applied by the liquid crystal pixels in the non-scanning time is zero voltage, and the backlight is continuously lit.
  • FIG. 8 is a schematic diagram showing the principle of a positive driving waveform of a display having a 1/3 duty ratio by using a 1/4 duty driving wave.
  • This embodiment is described by a TN type positive display passive matrix dynamic drive field sequential color liquid crystal display.
  • the bias voltage is 1/3
  • the OFF response time of the liquid crystal is 2 milliseconds.
  • the frame rate is 60 Hz, so the time per field is 5.6 milliseconds.
  • the scan time per COM is 1.4 milliseconds.
  • the passive matrix dynamic drive field sequential color liquid crystal display is a display with only three COMs, namely COM1, COM2 and COM3, which is a 1/3 duty display, but, this In the invention, it is driven by a 1/4 duty cycle driver, so that COM1, COM2, and COM3 are all applied with voltage, and the 1/4 duty cycle driver should drive COM4 (not shown).
  • the drive waveform is not used, so that the last display period of the 1/4 duty cycle is idle, and the idle COM4 display period constitutes a 1.4-millisecond non-scanning area, so there is enough
  • the ground time is used to ensure that the rising area of the cyan light transmission intensity is in the same cyan area after COM3 is scanned, so that the red of the COM1, the red of the COM2, and the red of the COM3 in the same picture are substantially the same.
  • This type of driving method is the most economical, and can be directly selected from a 1/3 duty-cycle driver chip to drive two COM displays; or a 1/4 duty-cycle driver chip to drive a display with three COMs; A 1/5 duty cycle driver chip drives a display with 4 COMs, etc., and so on.
  • each COM is scanned multiple times in the same field, and the non-scanning time is set a plurality of times.
  • a lower-level duty-cycle display with a driver chip with a higher duty cycle, such as a 1/2 duty-duty display. 1/4, 1/5 duty cycle, or even higher duty cycle drive chip to drive; for example, 1/3 duty cycle display can use 1/5, 1/6 duty cycle, and even A higher level duty cycle driver chip is used to drive and so on.
  • Figure 9 shows an example of a negative-field-sequence color liquid crystal display with three COMs driven by a driver with a 1/4 duty cycle.
  • there are two COM displays with 1/3 of the The driver is driven by the ratio; there are 4 COM displays, driven by a driver with a 1/5 duty cycle, and so on, which can achieve similar results.
  • the arrangement of the waveform polarities in the present invention is not limited to the arrangement described in the above embodiments, and the arrangement of the waveform polarities may be arranged in a plurality of ways, and the waveform polarity may be positive and negative in one field. Inversion can also be reversed between adjacent fields or adjacent frames.
  • the display of the red liquid crystal pixels is often described as an example, and the liquid crystal pixels displaying the other colors are also applicable.
  • the colors of the backlights are mostly described by three primary colors (R, G, B).
  • the colors in the present invention may be two or more colors, and the color arrangement thereof. The order can be arbitrarily selected, and the arrangement of colors is not limited to this embodiment.
  • the start of the COM scan in the above embodiment may be initiated at either COM or at any COM.
  • the length of the non-scanning time in the present invention is determined by the time required for the liquid crystal in the liquid crystal display to return from the pressurized state to the initial state.
  • the non-scanning time is between 1 and 4 milliseconds. It is better.
  • the voltage between all COM and SEG during the non-scanning time is less than or equal to the OFF voltage, preferably zero voltage.
  • the backlighting time of the backlight may be delayed from the start time of the first COM scan, the backlighting time of the backlight is referred to as a backlight delayed turn-on time, and the backlight is delayed to turn on the light.
  • the time is best chosen between 0.5 and 2.0 milliseconds.
  • FIG. 16 is basically the same as FIG. 10, and the difference is to explain the concept of the total light leakage amount.
  • the OFF voltage leakage amount in the figure is indicated by a diagonal line portion, and the ON voltage leakage amount in the figure is represented by the oblique well font portion. .
  • the sum of the OFF voltage leakage amount and the ON voltage leakage amount corresponding to COM1 is the total leakage amount of COM1; the sum of the OFF voltage leakage amount and the ON voltage leakage amount corresponding to COM2 is the total leakage amount of COM2.
  • FIG. 10 is a schematic diagram showing the principle of the driving waveform of the B waveform which is driven by the 1/2 duty cycle of the present invention.
  • a TN type liquid crystal display with a positive display mode is used, and the bias voltage is 1/2.
  • the OFF response time of the liquid crystal is 10 milliseconds. It comes in 2 different colors (red, The cyan LED backlight is driven with a 1/2 duty cycle, and the actual COM number is 2; each COM in the same field is scanned twice in sequence and the positive and negative polarities are inverted once.
  • the frame rate is 45 Hz.
  • the actual voltage applied by the liquid crystal pixels during the non-scanning time and the backlight closing time is zero volts.
  • the respective waveforms of COM and SEG may be combined by the waveforms of positive and negative polarities. As shown in the schematic diagram of Figure 10 (for clarity of the display, Figure 10 is not drawn to the actual time ratio):
  • the scan time is 1.1 milliseconds
  • the non-scan time is 7 milliseconds
  • the backlight is turned off for 3 milliseconds.
  • the liquid crystal pixels of COM1 and COM2 display red.
  • the uniformity of red shown in Figure 10 is worse than the red uniformity of the embodiment when the backlight is not turned off under the same conditions; but the contrast of red is The purity is superior to the contrast and purity of the embodiment when the backlight is turned off without the same conditions. This is because, in the embodiment shown in FIG.
  • the backlight closing time since the backlight closing time is set after the non-scanning time, the total light leakage amount of the liquid crystal pixels that need to be turned off is reduced, Thus, the contrast and purity of red are improved; however, due to the backlight closing time, the OFF voltage leakage amount of COM2 in the backlight closing time in FIG. 10 is smaller than the OFF voltage leakage amount of COM1 in FIG.
  • the amount of reduction (the black triangle in Figure 10 is the difference between the total light leakage, and the dotted square in the figure is the amount of light leakage during the backlight off time). Therefore, the total light leakage of COM2 is greater than that of COM1.
  • the total amount of light leakage, so the red uniformity between the COM is slightly different.
  • the backlight closing time is controlled within an appropriate range, a balance point can be found, and the contrast and purity are better.
  • the backlight closing time is kept within an appropriate range, the uniformity of redness, contrast and purity are good, and it is acceptable.
  • FIG. 11 is a schematic diagram showing the principle of the driving waveform of the B waveform which is driven by the 1/2 duty cycle of the present invention.
  • a TN type liquid crystal display with a positive display mode is used, and the bias voltage is 1/2.
  • the OFF response time of the liquid crystal is 3 milliseconds. It uses three different color (R, G, B) LED backlights, driven at 1/2 duty cycle, the actual COM number is 2; each COM in the same field is scanned twice in sequence and The positive and negative polarities are reversed once.
  • the frame rate is 60 Hz.
  • the actual voltage applied by the liquid crystal pixels during the non-scanning time and backlight backlighting time is zero volts.
  • the combination of the non-scanning time and the backlight closing time is variable from 1 millisecond to 5 milliseconds. (In order to show clarity, Figure 11 does not map according to the actual time ratio):
  • the scan time is 2.6 milliseconds
  • the non-scan time is 2 milliseconds
  • the backlight is turned off for 1 millisecond.
  • the liquid crystal pixels of COM1 and COM2 display red.
  • the uniformity of red in the embodiment shown in Fig. 11 is slightly worse than the red uniformity in the embodiment shown in Fig. 5; however, the contrast and purity of red are better than those in Fig. 5.
  • the embodiment is shown. The reason is as described in the embodiment shown in FIG.
  • the invention increases the backlight closing time after the non-scanning time, if the non-scanning time is greater than or equal to the OFF response time of the liquid crystal, and then follows the backlight closing time, the color of the liquid crystal display can be ensured. Uniformity, contrast and purity are better than a continuous backlight. However, in practical applications, if the OFF response time is longer, The non-scanning time is also forced to be extended, which causes too much total light leakage, the color purity is deteriorated, and the contrast is reduced. So we can make the non-scan time less than the LCD's OFF response time, Then, followed by the backlight to turn off the light, which can increase the purity of the color.
  • each COM is scanned twice in the same field, and the positive and negative polarity Also inverting once, the COM scan order of the same color in each of the adjacent two frames is reversed; the second is that each COM is sequentially scanned once in the same field, and the positive and negative polarities are also inverted once.
  • the COM scan order of the same color corresponding to each frame in the same field is reversed; the third is that each COM is sequentially scanned once in the same field, and the positive and negative polarities are also inverted once, and not only in the same field.
  • FIG. 12 is a schematic diagram showing the principle of driving waveforms of the B waveform which is driven by the 1/2 duty cycle of the present invention.
  • a TN type liquid crystal display with a positive display mode is adopted, and the OFF response time of the liquid crystal is 3 milliseconds.
  • the actual COM number is 2; in the same field, each COM is scanned twice in sequence, and positive and negative
  • the polarity is also reversed once.
  • the COM scanning order in the field of the same color (cyan) corresponding to each of the adjacent two frames is reversed.
  • the frame rate is 40 to 80 Hz.
  • the non-scanning time is 1 to 5 milliseconds
  • the backlight closing time is 0 milliseconds to 5 milliseconds variable
  • the non-scanning time and the backlight closing time are 1 millisecond to 5 milliseconds change
  • the non-scanning time and backlight are closed.
  • the actual voltage applied by the liquid crystal pixels during the lamp time is zero volts.
  • each COM is sequentially scanned twice in the same field, and the positive and negative polarities are also inverted once, and the COM scan order of the same color corresponding to each of the adjacent two frames is reversed.
  • the total light leakage amount of COM1 and COM2 is not equal due to the backlight closing time. Since the red of COM1 and COM2 is immediately compensated in the second frame, the uniformity of the display display color is not greatly affected. Can achieve practical results.
  • FIG. 13 is a schematic diagram of the driving waveform of the B waveform in the present invention using a 1/3 duty cycle driving.
  • a TN type liquid crystal display with a positive display mode is adopted, and the OFF response time of the liquid crystal is 3 milliseconds. It uses three different color (R, G, B) backlights, driven by 1/3 duty cycle, the actual COM number is 3; each COM is scanned forward and reverse in the same field Once, the positive and negative polarity are also reversed once.
  • the frame rate is 50 to 80 Hz.
  • Non-scanning time is 2 to 3 milliseconds
  • backlight closing time is 0 milliseconds to 3 milliseconds variable
  • non-scanning time and backlight closing time are 2 milliseconds to 3 milliseconds change
  • non-scanning time and backlight is turned off
  • the actual voltage applied by the liquid crystal pixels is OFF voltage.
  • FIG. 14 is a schematic diagram showing the principle of driving waveforms of the B waveform which is driven by the 1/2 duty cycle of the present invention.
  • a TN type liquid crystal display with a positive display mode is used, and the bias voltage is 1/2.
  • the OFF response time of the liquid crystal is 3.5 milliseconds. It uses three different color (R, G, B) LED backlights, driven by 1/2 duty cycle, the actual COM number is 2; in the same field, each COM is forward and reverse The scan was performed once, and the positive and negative polarities were also inverted once. The COM scanning order in the field of the same color corresponding to each of the adjacent two frames is reversed.
  • the frame rate is 60 to 80 Hz, and the combination of the non-scanning time and the backlight closing time is 1 millisecond to 5 milliseconds.
  • the non-scanning time and the actual voltage applied by the liquid crystal pixels during the backlight closing time are zero volts.
  • FIG. 15 is a schematic diagram showing the principle of the driving waveform of the B waveform which is driven by the 1/3 duty cycle of the present invention.
  • a TN type liquid crystal display with a positive display mode is used, and the bias voltage is 1/2.
  • the OFF response time of the liquid crystal is 4 milliseconds. It uses three different color (R, G, B) LED backlights, driven by 1/3 duty cycle, the actual COM number is 3; in the same field, each COM is forward and reverse The scan was performed once, and the positive and negative polarities were also inverted once. The COM scanning order in the field of the same color corresponding to each of the adjacent two frames is reversed.
  • the frame rate is 60 Hz
  • the non-scanning time is 3 milliseconds
  • the backlight closing time is 0 milliseconds to 4 milliseconds variable
  • the non-scanning time and the backlight closing time are 0 milliseconds to 4 milliseconds
  • the liquid crystal is not scanned.
  • the actual voltage applied by the pixel is zero volts.
  • Example 19 The present invention is a driving waveform (not drawn) in which a B waveform which is driven by a 1/16 duty ratio is displayed.
  • the HTN type liquid crystal display with positive display mode has a bias voltage of 1/5.
  • the OFF response time of the liquid crystal is 4 milliseconds. It uses three different color (R, G, B) LED backlights, driven at 1/16 duty cycle, the actual COM number is 16; in the same field, each COM is forward and reverse The scan was performed once, and the positive and negative polarities were also inverted once.
  • the COM scanning order in the field of the same color corresponding to each of the adjacent two frames is reversed.
  • the frame rate is 60 Hz
  • the non-scanning time is 1 millisecond to 4 milliseconds variable
  • the backlight closing time is 0 milliseconds to 4 milliseconds variable
  • the actual voltage applied by the liquid crystal pixels is zero during the non-scanning time and backlight backlighting time. Volt voltage.
  • the liquid crystal display can display a dot color image of 16 ⁇ 128 pixels well when the backlight delays the turn-on time (the backlight turn-on time lags the start time of the first COM scan) to 0.8 milliseconds. And the color is even, The purity is also good.
  • FIG. 17 is a color diagram of a backlight in which the backlight is two sets of colors and the liquid crystal pixels are switched twice in the same color region.
  • a set of red (R) and a set of green (G) all of the corresponding color LED lights can be used
  • the opening of the liquid crystal pixels can be changed.
  • you can achieve the purpose of rich color as shown in the first line in Figure 17, the red light and green are opened once, then the color is dark yellow; in the second line, the red light and green are turned twice, then yellow
  • the red light is turned on twice in the third row, and orange is turned on once in green.
  • FIG. 18 is a color diagram of a backlight in which the backlight is three sets of colors and the liquid crystal pixels are switched twice in the same color region.
  • the backlight red (R) LED, green (G) LED and blue (B) LED of the dynamic driving field sequential color liquid crystal display are driven at normal frequency, and sequentially displayed in RGB and RGB cycles.
  • the switching time of the liquid crystal pixel is only half of the time of each monochrome display (of course, the switching time of the liquid crystal pixel may not be half, it can Less than or more than half, as long as the switch is twice, the same can be achieved to adjust the color of the dynamic drive field sequential color liquid crystal display), that is, it can be turned on twice or off twice, or on and off each time.
  • the switching time of the liquid crystal pixel may not be half, it can Less than or more than half, as long as the switch is twice, the same can be achieved to adjust the color of the dynamic drive field sequential color liquid crystal display), that is, it can be turned on twice or off twice, or on and off each time.
  • the displayed color is dark red; as shown in the second line in Figure 18, when the backlight is red, the liquid crystal pixels are continuously turned on twice, and the other time is off. At this time, the color of the dynamic driving field sequential color liquid crystal display is red.
  • the third behavior is dark green, the fourth behavior is green, and so on. This combination gives 27 different colors. In this way, the display color of the dynamic drive field sequential color liquid crystal display is enriched.
  • FIG. 19 is a color diagram of a backlight in which the backlight is three sets of colors and the liquid crystal pixels are switched three times in the same color region.
  • the basic principle is the same as that shown in FIG. 18, except that the backlight shown in FIG. 19 is a backlight red (R) LED lamp of a dynamic driving field sequential color liquid crystal display, green. (G) LED light and blue (B) LED light are also driven at normal frequency, sequentially displayed in RGB, RGB cycle, but for the time displayed in each color (red, green or blue), liquid crystal pixels
  • the switching time is one-third of each monochrome display time (which can also be less than or greater than one-third), ie it can be switched three times.
  • the liquid crystal pixels are only turned on once, the time is one-third of the backlight red, and the other time is off.
  • the dynamic driving field sequential color liquid crystal display is dynamically driven.
  • the displayed color is reddish; as shown in the second line of Figure 19, when the backlight is red, the liquid crystal pixels are continuously turned on twice, and the other times are off.
  • the color of the dynamically driven field sequential color liquid crystal display is dark. Red; as shown in the third line in Figure 19, when the backlight is red, the liquid crystal pixels are continuously turned on three times, and the other time is off.
  • the color of the dynamic driving field sequential color liquid crystal display is red; similarly, dynamic driving
  • the color of the field sequential color liquid crystal display is slightly green, dark green, green, and the like. This combination gives you 64 different colors. In this way, the display color of the dynamic driving field sequential color liquid crystal display is further enriched.
  • liquid crystal pixels switch time only accounts for one quarter, one-fifth, etc. of the monochrome display time of the backlight, they can respectively combine different colors such as 125 and 216.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

La présente invention concerne un procédé de commande dynamique d'un affichage à cristaux liquides (LCD) couleur à séquence de champ. Dans une matrice passive commandant dynamiquement un LCD couleur à séquence de champ dont une source de rétroéclairage dispose au moins de deux couleurs ou plus, plusieurs champs constituent une trame et chaque champ comprend une période de balayage, une période de non-balayage et une période d'extinction de la source de rétroéclairage d'un COM. Chaque COM est balayé séquentiellement pour commander tous les pixels de cristaux liquides durant la période de balayage. La période de non-balayage est la période au cours de laquelle tous les pixels de cristaux liquides ne sont pas commandés, mais la source de rétroéclairage est illuminée en permanence après que la période de balayage est écoulée. La période d'extinction de la source de rétroéclairage est la période durant laquelle tous les pixels de cristaux liquides ne sont pas commandés et la source de rétroéclairage est éteinte après que la période de non-balayage est écoulée. La somme de la période de non-balayage et de la période d'extinction de la source de rétroéclairage est située entre 1 et 10 millisecondes.
PCT/CN2010/070389 2009-02-27 2010-01-27 Procédé de commande dynamique d'un affichage à cristaux liquides couleur à séquence de champ WO2010097018A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/145,793 US8743035B2 (en) 2009-02-27 2010-01-27 Driving method for dynamically driving a field sequential color liquid crystal display

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN2009101184393A CN101807381B (zh) 2009-02-17 2009-02-27 动态驱动场序彩色液晶显示器的驱动方法
CN200910118439.3 2009-02-27
CN200910138337.8 2009-04-26
CN 200910138337 CN101840675B (zh) 2009-03-17 2009-04-26 动态驱动场序彩色液晶显示器的驱动方法
CN2009101090786A CN101989409A (zh) 2009-07-31 2009-07-31 动态驱动场序彩色液晶显示器的驱动方法
CN200910109078.6 2009-07-31

Publications (1)

Publication Number Publication Date
WO2010097018A1 true WO2010097018A1 (fr) 2010-09-02

Family

ID=42665019

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2010/070389 WO2010097018A1 (fr) 2009-02-27 2010-01-27 Procédé de commande dynamique d'un affichage à cristaux liquides couleur à séquence de champ

Country Status (2)

Country Link
US (1) US8743035B2 (fr)
WO (1) WO2010097018A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110080423A1 (en) * 2009-10-07 2011-04-07 Sharp Laboratories Of America, Inc. Temporal color liquid crystal display

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8711167B2 (en) * 2011-05-10 2014-04-29 Nvidia Corporation Method and apparatus for generating images using a color field sequential display
US9299312B2 (en) 2011-05-10 2016-03-29 Nvidia Corporation Method and apparatus for generating images using a color field sequential display

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003001495A1 (fr) * 2001-06-25 2003-01-03 Matsushita Electric Industrial Co., Ltd. Affichage a cristaux liquides et dispositif electronique
US20080084512A1 (en) * 2006-10-06 2008-04-10 Brott Robert L Stereoscopic 3d liquid crystal display apparatus with slatted light guide
JP2008096927A (ja) * 2006-10-16 2008-04-24 Toshiba Matsushita Display Technology Co Ltd 液晶表示装置、液晶表示装置の駆動方法、プログラム、及び記録媒体
CN101226291A (zh) * 2007-01-15 2008-07-23 胜华科技股份有限公司 场序液晶显示器及其驱动方法
CN101369407A (zh) * 2008-10-14 2009-02-18 复旦大学 场序制彩色led背光源技术的控制方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW514847B (en) * 1998-03-10 2002-12-21 Tanita Seisakusho Kk LCD display with function of adjusting display density
JP3956337B2 (ja) * 2001-03-16 2007-08-08 オリンパス株式会社 面順次カラー表示装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003001495A1 (fr) * 2001-06-25 2003-01-03 Matsushita Electric Industrial Co., Ltd. Affichage a cristaux liquides et dispositif electronique
US20080084512A1 (en) * 2006-10-06 2008-04-10 Brott Robert L Stereoscopic 3d liquid crystal display apparatus with slatted light guide
JP2008096927A (ja) * 2006-10-16 2008-04-24 Toshiba Matsushita Display Technology Co Ltd 液晶表示装置、液晶表示装置の駆動方法、プログラム、及び記録媒体
CN101226291A (zh) * 2007-01-15 2008-07-23 胜华科技股份有限公司 场序液晶显示器及其驱动方法
CN101369407A (zh) * 2008-10-14 2009-02-18 复旦大学 场序制彩色led背光源技术的控制方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110080423A1 (en) * 2009-10-07 2011-04-07 Sharp Laboratories Of America, Inc. Temporal color liquid crystal display
US8581923B2 (en) * 2009-10-07 2013-11-12 Sharp Laboratories Of America, Inc. Temporal color liquid crystal display

Also Published As

Publication number Publication date
US8743035B2 (en) 2014-06-03
US20110298840A1 (en) 2011-12-08

Similar Documents

Publication Publication Date Title
US6329971B2 (en) Display system having electrode modulation to alter a state of an electro-optic layer
WO2020256385A1 (fr) Module d'affichage et procédé d'attaque associé
US6304239B1 (en) Display system having electrode modulation to alter a state of an electro-optic layer
CN101523279A (zh) 液晶显示面板、液晶显示元件和液晶显示装置
US8537083B2 (en) Method for controlling common voltage of the liquid crystal display device
US8451206B2 (en) Liquid crystal display and method with field sequential driving and frame polarity reversal
WO2019080283A1 (fr) Appareil et procédé de commande pour panneau d'affichage
WO2014042425A1 (fr) Procédé d'affichage par répartition dans le temps et dispositif d'affichage à cristaux liquides
US8026883B2 (en) Liquid crystal display having gate delay compensator
WO2010097018A1 (fr) Procédé de commande dynamique d'un affichage à cristaux liquides couleur à séquence de champ
WO2014190584A1 (fr) Écran d'affichage à correction de dominante de couleur
WO2018113404A1 (fr) Procédé d'attaque et unité d'attaque pour dispositif d'affichage, et dispositif d'affichage
WO2013033923A1 (fr) Panneau d'affichage à cristaux liquides et son procédé de commande de tension
WO2018120902A1 (fr) Procédé et dispositif de compensation d'aberration chromatique d'angle de vue de dispositif d'affichage et dispositif d'affichage
TWI601111B (zh) 顯示面板的驅動方法
WO2015184659A1 (fr) Circuit de commande et dispositif d'affichage à cristaux liquides
US8902147B2 (en) Gate signal line driving circuit and display device
WO2019098513A1 (fr) Dispositif d'affichage et procédé de commande associé
US10607556B2 (en) Driving scheme for ferroelectric liquid crystal displays
WO2019124734A1 (fr) Appareil d'affichage
KR19980019080A (ko) 액정 표시 장치 및 이 액정 표시 장치의 구동회로(liquid crystal display apparatus and driving circuit for the same)
WO2016208321A1 (fr) Circuit de commande, dispositif d'affichage, appareil électronique et dispositif d'affichage de type projection
EP1008132A1 (fr) Systeme d'afficheur a modification de l'etat de la couche electro-optique par modulation d'une tension d'electrode
KR100767373B1 (ko) 액정 표시 장치의 구동 장치
WO2019054640A1 (fr) Dispositif d'affichage

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10745802

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 13145793

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS (EPO FORM 1205A DATED 20-01-2012)

122 Ep: pct application non-entry in european phase

Ref document number: 10745802

Country of ref document: EP

Kind code of ref document: A1